Self-loading truck



12 Sheets-Sheet 2 L. G. KURTZ ET AL SELF-LOADING TRUCK Filed Jul'y 51,1937 llll'l Dec. 23, 1941.

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Dec. 23, 1941. L.. G. KURTZ ETAI.

SELF-LOADING TRUCK Filed Juiy 51, `195'( 12 sheep-sheet 1 .M M m, Ud

Dec. 23, 1941. L.. G. KURTZ ETAL 2,266,770

' SELF-LOADING TRUCK Filed July 51,l 1957 12 sheets-sheet s Dec. 23,1941. l.. G. KURTZ ET l.

SELF-LOADING TRUCK Filed July 31, 1937 12 sheets-sheet 4 Dec. 23,1941. 1G. KURTZ ET AL SELF-LOADING TRUCK Filed July 31, 1937 12 Sheets-Sheet 5www,

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Dec. 23, 1941. L. G. KURTZ ETAL SELF-LOADING TRUCK 12 sheets-'sheet eFiled July 5l, 1937 Gum/ww Dec. 23, 1941. 1 G. KURTZ ET Al.

' SELF-LOADING TRUCK Filed July .31, 1937 l2 SheetS--SheerI 7 Chf/O.Oibsah! Dec.'23, 1941. L .'G. KURTZ ET Al.` v '2,266,770

SELF-LOADING TRUCK Filed July 51, 1937 vl2 Sheets-Sheet vDecQZI, 17941.1*.. G. KURTZ ETAL SELF-LOADING TRUCK Filed July 51, 19.37 l2Sheets-Sheet 9 gw. o m/ Dec. 23, 1941'. L. G. KURTZ l-:T A1.

SELF-LOADING TRUCK Filed July 51, 1957 12 Sheets-Sheet 10 'De'.23, 1941.Lamm ETAL 2,266,770

SELF-LOADING TRUCK Filed July 51., 1957 12 sheets-sheet 11 .1&9

D ec. 23, 1941. L. G. KURTZ' ETAL ,2,266,770

` SELF-LOADING TRUCK Filed July 31, 1957 12 sheets-sheet 1 '2 PatentedDec. 23, 1941 UNITED STATES.

PATEN'L oFFlcE SELF-LOADIN G TRUCK Loron G. Kurtz, Brooklyn, and Carl C.Ottoson, Port Richmond, Staten Island, N. Y.

Application July 31, 1937, Serial No. 156,782

25 Claims.

rear end of the conveyor and carried by it up and into the truck body. l

The collection or dump body is preferably closed,.for preventing thespread of dust and odors, thus providing a sanitary assembly. The

horizontal portion of the conveyor extends into the upper part of thedump body and well toward the front thereof and serves to distribute thematerial evenly throughout the body and also to crush and compress theload into smaller volume.

The truck body is dumped by raising the front end thereof. Preferably,prior to dumping, the rear part of the conveyor is raised out of theway.

The principal objects of the invention are:

A. To provide, in a dump truck having a dump body and an endlessconveyor having a downwardly extending portion at the rear, poweroperated means for raising and lowering `the body for dumping and poweroperated means for raising and lowering the rear part of the conveyor,all in combination with Acontrol means which operates sequentially,whereby the rear part of the conveyor must be raisedpartially orcompletely before the body is raised for dumping.

B. To provide, in a dump truck having a dump substantially normalposition before the rear part of the conveyor is lowered to the normalposition. `However, these lowering operations could take placesimultaneously, rather than sequentially,if desired.

C. To provide, in a. truck having an endlessv conveyor, improvedmounting and driving means for the conveyor.

D. To provide, in a. dump truck provided with an endless conveyor,improved resilient mountden shocks that might be impressed on theconveyor and for compensating for possible slight variations in lengthof the conveyor incident to the raising and lowering of the rear partthereof.

s E. To provide, in a dumptruck provided with power operated means forraising and lowering the body and for raising and lowering a part of theendless' conveyor, improved power take-oil and power transmission means,for transmitting l power to the endless conveyor when it is in normalloading position, and 'for disconnecting this power transmissionpreparatory to dumping.

F. To provide, in a dump truck provided with an endless `conveyor at therear, power operated l means under the control of the operator forraising and lowering that portion of the conveyor at the rear end of thetruck.

G. To provide, in a dump-truck provided with a conveyor having adownwardly extending portion at the rear, hydraulic means for raisingand lowering this downwardly extending portion, including means,preferably a metered relief outlet valve, for cushioning and retardingthe lowering of this portion of the conveyor, and tail gate, to normalposition, without the usual jar.

3U such openings. The current of air from such fan would, of course, bescreened or ltered.

The invention also comprises, in addition to the foregoing, furtherimproved features of con struction and operation, which will bedescribed :lo .in connection with the accompanying drawings,

illustrating in some detail the present preferred embodiment of theinvention.

In the drawings: l

Figure 1 is a side view, partly in section, of the improved refusecollecting truck forming the subject matter of this invention;

Figure 2 is a plan view of the same;

Figure 3 is an end view;

Figure 4 is a side view of a portion of the truck showing a portion ofthe power transmitting unit for transmitting power to the conveyor onthe truck body; 1

Figure 5 is an enlarged side View of a power 50 transmitting assemblyfor delivering power to the truck body for` operating the conveyor;

Figure 6 is a plan view of the same; Figure 7 is an end view ofv Figure6; Figure 8 is a vertical sectionalview. of the powlng means for theconveyor, for absorbing suder transmission Clutch;

' for lowering the body;

Figure 9 is a section on the line 9-8 of Fig. 8, looking in thedirection of the arrows;

Figure 10 is a sectional view on the line I8-I8 of Fig, 8, looking inthe direction of the arrows;

'Figure l1 is an enlarged detail view of a portion of Fig. 8: i

Figure 12 is an enlarged plan view, partly in section, of the forwardend of the conveyor;

Figure 13 is a side view of the same;.

Figure 14 is a section on the line I4-I4 of Fig. 12;

Figure 15 is a fragmentary section on the line I5-I5 of Fig. 14;

Fig. 16 is an enlarged sectional view of the control valve andassociated parts for controlling the operation of raising and loweringthe conveyor and tail gate. and the body, the valve being inneutralposition:

Figure 17 shows the control valve in the position for raising theconveyor and tail gate;

Figure 18 shows the control valve in position for raising the body;

Figure 19 shows the control valve in position Figure 20 shows thecontrol valve, in position for lowering the conveyor and tail gate;

Figure 21 is a sectional view through the control valve taken at rightangles to the views just described;

Figure 22 is an enlarged sectionalvlew of the metered relief outletvalve for retarding the lowering of the tail gate;

Figure 23 is a section on the line 23-28 of Fig. 22; and

Figure 24 is a diagrammatic view of the control valve and itsconnections to the parts controlled thereby.

Figure 24A is a vertical sectional viewof a modified form of drive forthe conveyor;

Figure 25 is a section on the iine 25--25 of Fig. 24A;

Figure 26 is a plan view of the modified conveyor drive of Fig. 24A;

Figure 27 is an enlarged view, partly in verticonveyor housing I2, theback or right-hand portion of which forms or carries the tail gate forclosing the body I, is pivoted at its upper portion to the upper rearend of the truck body on the axis I8, a sliding, substantiallydust-proof hood, with which the upper end of the housing I2 telescopes,being shown at I4.

The lo'wer end of the housing I2 is provided with a boot I8. pivoted toswing up and down 10 on the pivot I6, springs I1, engaging respectivelywith the housing and with the boot, being provided as an aid in openingand closing thel boot.

The upper part of the boot is open, as at lia,

to feed material to the conveyor, the opening being bordered by a funnelange lib.

To describe further the mounting for the forward end of the conveyor,the sprockets 8 and 8 are carried by a drive shaft I8 mounted insuitable bearings-I8. Shaft I8 is coupled to shaft' 20 2l, which ispreferably the axle of a conventional worm gear mounted in gear casing2|, the worm of which isdriven by a shaft 22, having a squared end, towhich is attached a universal joint 22a, which is coupled to drive shaft88a.

The resilient mounting for the forward end of the conveyor will now bedescribed. The bearings for the drive shaft I8 are mounted in suit- Iable housings on movable side plates 28. The plates 28 are provided withguide slots 24 through which pass retaining bolts or guides 25, held inplace by plates 28, the bolts having shoulders thereon on which theplates 28 rest, to provide a clearance so that the plates may slide backand forth in a horizontal direction. The described gear box 2I andassociated parts are carried by and also move back and forth with theplates 28. The plates 28 are provided, at their inner ends, with flanges21 against which bear strong compression springs 28 coiled around a 40threaded shaft 28 which passes through a stud member 8l, suitable nuts8| and 32 being provided for controlling the positioning of the shaft 28and the degree of compression on the springs, as will be readilyunderstood, for controlling the cal section, of details of the modiiiedconveyor 45 force exerted by the Springs on the plates 2l ed on theautomotive chassis 2, being pivoted thereto on the pivot`8, for rearwarddumping, the raising of the body for dumping being -preferablyaccomplished by a known type of hydraulic jack 4 carried by the chassisand connected to the body I at 8. Any other suitable type of bodyraising and lowering device could be used.

The body I is substantially completely enclosed for .preventing thelescape ot dust and odors. An'endless conveyor indicated generally at 8and provided with blades or flights 1 engages with and is driven bypower driven sprockets 8 and 8, Fig.-l2, located at the forward end ofthe conveyor, this forward end, as indicated in Figure 1. being insidethe upper part of, and well toward the front of thebody I. The lowerstretch of Lthe conveyor moves to the right, as shown by the varrows inFig. 1. The conveyor passes around sprockets I 8 carried at the upperrear vpart of the body I and thensdownwardly and rearwardly to andaround the sprockets II,

conveyor housing I2. The'sprockets I8 could be omitted and'guide railsused'instead. This 'l5 the vertical shaft 41. The upper end of shaftFrom the described construction it will be evident that the forward endof the conveyor can move longitudinally in the slots 24 againstthetension of the springs 28, thereby cushioning the con- 50 veyor againstsudden shocks and compensating for any slight variations in length ofthe conveyor as it is raised and lowered. f

The drive shaft I8 is provided with a guard 88 supported on rearwardlyextending arms 84, provided with slots engaging over the xed studs 88,the arms 84 being thereby enabledto slide back and forth with thesprockets and drive shaft.

This guard andarms are -for preventingpieces of rags, rope, etc., fromwrapping around the rotating drive shaft I8.

The conveyor 8 isprovided wherever necessary with supporting guideways81.

The power take-off for taking power from -the engine ofthe vehicleandtransmitting it to the driveshaft I8 of the conveyor will now bedescribed, reference being made particularly to Figures 4, 5, 6, 7 and8. 'I'he housing 88 contains gears, shafts, etc.,I driven from theengieof the vehicle. Power from the housing 88 is carried into a gearshift housing 88 and delivered to a lower-'drive shaft 4I, which in'turndrives sprocket 42 that drives the chain 48, which ii;

through suitable gears in the housing ,drives 'The truck body isprovided with a shaft 49, the 'lower end of which is provided with aclutch face 48' for cooperative engagement with the clutch face 48. Inorder to facilitate this engagement, and keeping in mind that the shaft49 is raised `and lowered with the body of the truck, the lower part ofshaft 49 is provided with a slidable guide collar 68, chamfered at I,for guiding the clutch faces into engagement, collar 50 beingresiliently vided a self-aligning bearing 53, which bearing 4 -ismounted in a collar 54 supported by a complemental collar 55, thesecollars having a slight lateral movement, the clearance for which isshown at 56, see Fig. 8. Mounted within the clearance 56 is a sinuousspring 51 which allows the collars 54 and 56 to move laterally, buttends to bring them back to the central position. In order to preventgrit, etc., from the truck body from reaching the bearings, upper andlower washers 58 and 58 of rubber or the like, may be provided, held inplace by retaining elements 59. From the described construction it willbe seen that as the truck body is raised, the clutch faces 48 and 48'automatically disconnect themselves The metered relief valve 61. shownin Fig. 22, is provided with a spring-pressed ball 18, which allows freeflow of oil to the :lacks 63 for raising them. The reverse flow of oil,however, is much slower, taking place only through the small, meteredby-pass 1I, whereby the oil pressure is relieved only gradually,resulting in aA gradual lowering of the housing I2 and the tailgate.

The control valve housing, see Figs. 16-21, and Fig. 24, indicatedgenerally at 69, has an outlet 68 connected to pipe 66 for the jacks 63.-The valve housing also has an outlet 12 connected by a pipe 18 to anoil tank 14. The valvev housing is also provided with an outlet 15connected by a pipe 16 to the suction side of the pump 11. The valvehousing is connected to the pressure side of the pump by a pipe 18,threaded into the nipple 'I8a,. this nipple being provided with aone-way A valve formed by the ball 18 and spring 19.

and as the truck body is lowered, the collar 5I) takes over the clutchface 48, being guided to position by the collar 58, the self-aligningbearing 53 and its mounting allowing the shaft 49 to move slightlyfromthe vertical to compensate for the slight arcuate movement of shaft 49.

The shaft 49, as shown more particularly in Fig. 1, passes into a gearbox 60 and through suitable gears drives the shaft 68a, which iscoupled, slidably, with the drive 22, Fig. 13, of the worm gear incasing 2l, which worm gear, as has been described, drives the driveshaft I8 for the conveyor. The ratio of the sprockets, worm and othergears used should be arranged tn give the conveyor a speed of about 60feet a minute, with an engine Speed of 450 R. P. M.

- In practice, it is desirable 'to first raise the tail gate, and thento raise the body. However, these operations may be reversed, ifdesired, and

provided the tail gate has suillcient clearance to clear the ground evenif the body is raised first.

For this purpose, of raising the tail gate, hydraulic jacks .63 areprovided, these jacks being pivotally secured, at their right-hand ends,to pivots 64, the piston or power members of the jacks being connectedto power arms 65, which y in turn are connected at their outer ends tovalve 61. The pipe 66 is connected with` a controlv valve housing, to bedescribed later. Evidently, as pressure is applied to the pipe 66, thejacks 68 will be operated to raise the conveyor housing I2 and the tailgate carried thereby, and as the The control valve housing 69 is alsoprovided with an outlet 88, which is connected by a pipe 6I to the jacks4 for raising and lowering the body. The several described inlets andoutlets all communicate with the circular, cylindrical valve chamber 82,in which is rotatably mounted the valve body 88, of the shape shown, thevalve body being provided with a central passageway 84. The valve body88 is secured to an operating shaft 86, which is controlled by anoperating arm 86.

In order to relieve excess pressure, at the end of the upstroke aby-pass, comprising passages 81, 88 and 89, see Fig. 21, is provided,controlledby a spring-pressed, relief valve 98, which relieves excesspressure of oil and by-passes it back to the pump.' This is to relievepressure when the tail gate and truck body reach their up position, thusavoiding over loading the hydraulic pumps and the pressure lines.

'Ihe valve 88 is controlled by an operating rod 9|,.'connected-to theoperating arm 86, the operating rod 9| being controlled by a controlhandle 92, which is advanced step by step on the rack 92', so as toassume the following sequential positions:

1. First 'or neutral position, shown in Fig. 16. Inthis position. oilisqsimply circulating from the' pump to the valve and back to the pump.'I'he handle 92 is now in the "first notch a of the rack 82'.

2. Second or conveyor and tail gate lraising position, shown in Fig. 17,in which oil'under pressure passes into passage 68 and pipe. 66, to thejacks 68 for .raising the conveyorv and tail gate. The handle 82 isplaced in the second notch b of the rack for this operation.v

3. Third or body-raising position, 'shown in F18. 18, in which the oilunder pressure is held in the tail gate raising jacks 6 8 and oil underpressure is appliedA to the jacks 4 through pipe 8l for raising thebody. 'Ihe handle 92 is placed in the third notchv c of the rack forthis operation. When these two operations have been i completed, thetail gate and conveyor are raised pressure is relieved, through themetered relief valve 61, these parts will be lowered gradually.

and the'body has been raised and dumped.

- 4. Fourth position, shown in Fig. 19, where pressure is being relievedfrom the body raising jacks 4 and passed back through the passage 84 inthe valve and outlet 12 to the tankf," therebyy through the meteredrelief valve i1, whereby the lowering of the tail gate is gradual. 'I'hehandle92isplacedintheiifthnotcl13ofthe rack for this operation.

The foregoing operations are sequential. Af-

ter the sequence of operations has been completed, the control handle 92is returned to its -original position, which restores the valve to theposition shown in Fig. 16.

If it -is desired to lower the body and the tail gate simultaneously,the operator will move the manual control lever from the notch c on therack to notch e, skipping notch d, thus moving the control valve fxomthe position shown in Fig. 18 directly to the position shown in Fig. 20.By so doing, it is evident that the oil pressure would be relievedsimultaneously from the body raising jacks and from the tail gate jacks,with the result that both the body and the tail gate would be loweredsimultaneously. However, due to the presence of the metered relief valvein the oilline from the tail gate jacks, it is evident that the tailgate would be lowered more slowly than the body.

The pump 11 for supplying oil under pressure is driven by a shaft 94,the shaft 94 in turn driven by a. shaft 95, shaft 95 being connected tothe upper part of the gear shift 39. The gear f pump. Inasmuch as whenthe conveyor is being operated there is no need for oil pressure foroperating the lifting jacks and, conversely, when the lifting jacksI arebeing operated, the conveyor is not in operation, the gears in the gearshift 39 are arranged to drive either the lower shaft 4| or the uppershaft 95, but not to drive them both at lthe same time. The'gear shiftmay, of course, also assume a. neutral or inoperative position. Acontrol lever 96 pivoted on theaxis 96' for shifting the gears isprovided, this lever being connected by a rod 91 to the manual controlhandle 83, which may be providedwith the usual rack for holding it inany v.given set position.

The exhaust fan for creating a slight suction within thebody Iforcausinginwardilowof air through crevices for prevelaiting the escapeof dust will now be Buch an exhaust fan couldbeplacedinvariousposftions.Onepossible arrangement is shown-in Fig. 2, where the exhaust fan Il hasits inlet lll in 'eommunica tionwith the interiorofthebody Ltheexhaust|I| of thefandeliveringtoascreenoroutlet box |92 which would filter-outdust before allowing-the air toespe. '111e fan 33 mayconveuienuybedrivenbyaelnmmurmura:

greater clearance space at the discharge end of the conveyor, whichfacilitates the unloading thereof. Furthermore, any tendency forstrings, ropes, rags, etc., to wrap around the drive shaft is'eliminated by omitting 'the drive shaft.

Referring now to Figures 24 to 28, showing this modified drive, powerfrom the gear housing 3l', corresponding to housing 3l, is transmittedby suitable shafts and gears to the gear shift housing 39',corresponding to the gear shift housing 39, arranged to drivealternately the hoist oil pump or the conveyor, as has been described.Power from the gear shift housing 39 for driving the conveyor istransmitted to the universal joint |05, shaft |91, universal joint |08,and ,to shaft |09, the upper end of which is provided with a clutchelement Ill. The clutch ||0 engages with clutch carried by the lower endof the shaft H2, which is rotatably mounted in suitable pillow blocksH3.

It will be understood that the shaft |09 and associated parts arecarried by the chassis, and that the shaft ||2 and associated parts arecarried by theV truck body as it is lifted for dumping, the breakbetween the two shafts occurring at the clutch faces IIII, III.

The upper end of drive shaft I2 drives the universal joint ||4 which Aisconnected to a main drive shaft IIS, which extends upwardly, usually ata slight inclination, to the universal joint H6, connectedv with the'angle gear box'casing ||1, and drives shaft ||9 on which is drivesprocket H9, which drives chain |20. sprockets |2I cooperate with thedrive chain, and the chain drives sprockets |22 and |23 mountedrespectively on forwardly extending shafts |24 and |25. 'Ihese shafts|24 and |25 drive sleeves |26, Fig. 26, which telescopically engage withshafts |21, the engagement being such that sleeves |26 drive shafts |21,as by making the telescopically engaged parts angular in cross section.Shafts |21, through suitable connections |28, are operatively connectedwith the gear boxes |29 for worm gears, as by engagement with 22, Fig.12, the worms of these gears (not shown) driving the usual-worm wheel,each of the worm wheels driving shafts |39 which are providedwith driveframe members |34. The mounting between the slidable plates l'and thexed plates |34 is of .theboltandslottypeasshowninconnection turn, isdriven by a sm'oehet'rriedon an ex,

tension |94 oftheshaft Il. Thechaln'l mild be sumciently slackto allowfor back' and forth movements of Il, which slack would betakenupbymon-drive shaft. I n the modified drive abouttobedesm'lbed,`thedriveshaftiselim inated, and the two sproehetsdrlvenseparately.

'with the mounting 0f the-sutiable plates 23- in Figure l2 and suchillustration is not repeated here. The slidable plat |33 are providedwith upturnedilanges Iliagalnstwhich bear-strong .compression vsprings|39, the other 'end of the springs bearingiagalnst plates |31 held inplace adiustablybythenuts l3onathreadedshaftA l39,aroundwhichthespringl'iscolled. This' resilient mountimachievesthe same general ef fectasthat achievedbythe mountingsshownin Figures 12, 13 and 14. the springskeeping the oonveyorehainstautatall times andtakingupanysuddenshocksthatmaybeimpressedonthechainaas-bytbehandlingofveryheavymate-- riaLsuchaspavingblochandthelike. 'lheslid- Suitable idler able connection between the drive members|26 and |21 permits the fore and aft sliding move-- ment of the slidingplates |33.

. Also, with this modification, an exhaust fan of the type shown at 99,Figure 2, may be used, power for the fan being tapped off at anyconvenient point, as by taking it on the right-hand end or' either ofshafts |24 or'l25, Figure 26.

To describe further details of .the mounting -for the shafts |09 and ||2and referring particularly to Figure 27, shaft |09 is mounted in afloating bearing comprising upper and lower collars |4| and |42, thesecollars being resiliently held at their outer edges by a resilientpacking |43 kept in place by a retainer flange |44. The resilientpacking |43 lallows. the bearing and the shaft to shift laterally foraccurate coupling engagement of the clutch and The upper part of shaft|09, just below the clutch H0, is provided with a centering collar |45.

The upper' shaft ||2 is provided at its lower end with a spring `mountedcentering collar |46,

which is provided with a centering ring |41, in-

While the present preferred embodiment of l and shown, but vit may bevcarried out in other ways.

We claim as our invention:

1. In an automotive truck of the characterdescribed, in combination, atruck body, an endless conveyor mounted in the upper part of the truckbody and having a pivotally mounted downward extension, means forraising the downward extension, means for raising the truck body, andunitary control means for causing the downward extension to be rstraised and then held stationary as the truck body is raised for'dumping.

2. In an automotive truck of the character described, in combination, 'atruck body, an endless conveyor mounted in the upper part of the truckbody and having -a pivotally mounted downward extension, means forresiliently mounting the conveyor, hydraulic means for raising saiddownward extension, and hydraulic means for raising the truck body, andmeans for driving the conveyor and for operating both said hydraulicmealns by power derived from the motor of the truc 3. In an automotivetruck of the character described, ln combination, a truck body, anendless l conveyor mounted in the upper part of the truck body andhaving a pivotally mounted downward extension, resilient meanscooperating with the conveyor, for keeping it taut and for enabling itto absorb shocks, hydraulic means for raising the downward extension,hydraulic means for raising the truck body. and a common manual controlfor both said hydraulic means.

4. In an automotive truck of the character described, in combination, atruck body, an endless conveyor resiliently mounted at its forward endmounted in the upper part ofthe truck body and havingv a pivotallymounted downward exf tension. hydraulic means for Vraising said dcwn- 7ddumping.

5. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mountedin the upper part of the truckbody and having a pivotally mounted downward extension, hydraulic meansfor raising said downward extension. hydraulic means for raising thetruck body and a common manually operated control means for both saidhydraulic means for starting the raising of the downward extensionbefore starting the raising of the body, to' effect consecutiveoperation of the raising of the downward and rearward extension and theraising of the truck body in the operation of raising the truck body fordumping.

6. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mounted in the upper part of the truckbody and having a pivotally mounted downward extension, hydraulic meansfor raising said downward extension, hydraulic means for raising thetruck body and` a common manually operated control means for both saidhydraulic means for lowering the downward extension and the bodysimultaneously or consecutively.

'1. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mounted in the upper part of the truckbody and having a pivotally mounted downward extension, hydraulic meansfor raising said downward extension including as a part thereof meansfor retarding and cushioning the lowering of said downward extension toits original position, hydraulic means for raising the truck body,'and acommon control for both said hydraulic means.

8. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mounted in the upper part of the truckbody and having a pivotally moimted downward extensiom means for raisingand lowering said extension, means for raising and lowering said body.and means foi-.resiliently mounting one end of the conveyor comprising atransversely extending drive shaft for the conveyor. bearings therefor,slidable plates for supporting said bearings, and resilient mountingmeans for said slidable plates. Y

9. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mounted in the upper part of the truckbody and having a pivotally mounted downward l extension, means forraising and lowering said extension, means for raising and lowering saidbody and means for resiliently mounting one end of the conveyorcomprising a transversely extending drive shaft for the conveyor, aguard around said shaft, bearings for said shaft, slidable plates forsupporting said guard and said bearings, and resilient mounting meansfor said slidable plates.

10. In an automotive truck of the character described, in combination, atruck body. an endless conveyor mounted in the upper part of the truckbody and having a pivotally mounted downward extension, means forraising and lowering said extension, means for raising and loweringsaidbody, means for resiliently mounting 'one end of the conveyorcomprising a transversely extending drive shaft for the conveyor,bearings therefor, slidable plates for supporting said bearings,resilient mounting means for said slidable plates and driving means forsaid drive shaft, mounted on and movable with one of said side plates;

11. In an automotive truck of the character described, in combination, atruck body, an endless conveyor mountedin the upperpart of the truckbody and having a pivotally mounted downward extension, means forraising and lowering said extension, means for raising and lowerldescribed, in combination, va truck body pivoted ing said body, andmeans for resiliently mounting one end of the conveyor'comprising atransversely extending drive shaft for the conveyor, a worm gear fordriving said drive shaft, bearings for said drive shaft, slidable platesfor supporting said worm gear and said bearings, and means forresiliently mounting said slidable plates. i

12. In an automotive truck of the character described, in combination, atruck body, means for raising and lowering said body, an endlessconveyor mounted in the upper part of the truck body and having apivotally mounted downward extension, vmeans for driving the conveyor atits forward end, means for transmitting power to said driving means,`comprising a laterally extending shaft and a cooperating, downwardlyextending shaft carried by the truck body, power supplying means on thechassis of the truck, and clutch coupling means, carried respectively bythe lower end of said downwarlly extending shaft and by said powersupplying means, for supplying power to said shaft, said clutch couplingmeans automatically disengaging and engaging, respectively, as the truckbody is raised and lowered.

13. In an automotive truck of the character described, in.,vcombination, a truck body pivoted.

for dumping', a power driven endless conveyor mounted in the upper, rearpart of the body and having a pivotally mounted downward extension,hydraulic -means for raising and lowering the body, hydraulic means forraising and lowering the downward extension, means, driven by powerderived from the motorlof the truck, for supplying iiuid under pressurefor both said hydraulic means and unitary control means for said twohydraulic means for operating said two hydraulic means consecutively.

14. In an automotive truck of the character described, in combination, atruck body pivoted for dumping; a power driven endless conveyormountedinthe upperpart ofsaidbodyandhaving a pivotally molmted downwardextension. hydraulic means forraising and lowering said .downwardextension. hydrulic means for raising andlowering said truckbody,.a,fluid pump for supplying duid under-pressure for bothhydraulicmeans, power take ci! means for supplying power for operatingsaid pump and s common manual control for both said hydraulicmeansforinitiatingtheraising ofthedownwardextension'before initiatingtheraising of the trucs 15. In 'an automotive truck of the' characterdescribed, in combustion, a truck body, pivutedfordumplng,apowerdrivenendlessconveyormountedintheupper'partofsaidbodyandhsving a pivotally mounted downwardextension, hydraulic means for raising and lowering said downwardextension, hydraulic means for raising for dumping, a power drivenendless conveyor mounted in the upper part of said body and having apivotally 'mounted downward and rearward extension, hydraulic means forraising and lowering said downward extension, hydraulic means forraising and lowering said truck body, a fluid pump for supplying fluidunder pressure for both' said hydraulic means, power take off means forsupplying power for operating said pump and for operating said endlessconveyor and gear shift means cooperating with said power take off meansfor supplying power alternatively either to the fluid pump or to theendless conveyor.

17. In an automotive truck of the character described, in combination, atruck body pivoted for dumping, a power driven endless conveyor mountedin the upper part of said body and having a pivotally mounted downwardextension, hy'- draulic means for raising and lowering said downwardextension, hydraulic means for raising and lowering said truck body, aduid pump for supplying iiud un'der pressure for both said hydraulicmeans, power take oil means for supplying power for operating said pumpand for operating said endless conveyor, gear sh'ift means cooperatingwith said powertake ofi means for automatically disconnecting the-supplyof power to the endless conveyor when the body is raised. 18. In anautomotive truck of the character described, in combination, a truckbody, an endless conveyorcomprising a pair of side chains, carried bysaid truck body, a pair of laterally and oppositely disposed drivewheels for driving, respectively, the side chains of the conveyor, thespace between said" drive wheels being unobstructed by a transverselyextending shaft, and means for applying power to said drive wheels.

19. In an automotive truck of the character described, in combination, atruck body, an endless conveyor, comprising a pair of side chains,carrled'bysaidtruckbodmapairoi laterally and oppositely disposed drivewheels for driving. respectively, the side chains of the conveyor, the

Yspace between said drive wheels being unob-v structed by a transversely'extending shaft, and

a common means for applying power simultane- 'ously to said drivewheels.

.andoppositelydisposeddrlvewheelsfordrlvlng.erativelyoonnectingsaiddrivewheelswlthsaidandloweringsaidtruckbody,afluidpumpfor -hsupplyingnuiriunderpres'sureforbotlis'aidhy-` drsulic mesnapower takeoi! means for supplyrespectlvelnthesideehalmoftheconveyontbespacebetweensaiddrivewheelsbeing-unob-- structed by a transverselyextendinsshafta downwardlyextendingdrlveshattandmeansop.-

downwardly extending drive shaft.

21.1n an automotlvetrnckof the characterl described. in combination, atruck body pivoted for dumping. an endless conveyor, comprising apairofsldechainacarriedbytheuppenrear' part of said truck'body, a pairof laterally and oppositely disposed drive wheels. for driving.

in gpowerforopex'ai:iugssidpumpandfororlel'- 'Il mpeotlvelmtholideoonveyoatho aecomo space between said drive wheels being unobstructed bya transversely extending shaft, and means, including a clutchdisconnectible when the bodyisraised for dumping, forv applying powersimultaneously to said drive wheels.

22'. In an automotive truck of the character described, in combination,a truck body, an endcarried by said truck body, a pair of laterally andoppositely disposed drive wheels for driving, respectively, the sidechains 'of the conveyor, the space between said drive wheels beingunobstructed by a transversely extending shaft, means for resilientlymounting said drive wheels for causing them to exert tension on saidside chains, and means for applying power to` said drive wheels.

23. In an automotive truck of the character described, in combination, atruck body, an endless conveyor, comprising a pair of side chains,carried by said truck body, a pair of laterally and oppositely disposeddrive wheels for driving, respectively, the side chains oi' theconveyor, .the space betweenv said drive wheels being unobstructed bya-transversely extending shaft, means for resiliently mounting saiddrive wheels for causing them to exert tension on said side chains, adownwardly extending drive shaft, and means operatively connecting saiddrive wheels with said downwardly extending drive shaft.

24. In an automotive truck of the character described, in combination, atruck body pivoted less conveyor, comprising a pair of side chains,

less conveyor.

for dumping, an endless conveyor. comprising a pair of side chains,carried by the'upper, rear part of said truck body, a pair of laterallyand oppositely disposed drive wheels, for driving, respectively, theside chains of the conveyor, the space between said drive wheels beingunobstructed by a transversely extending shaft, means for resiliently.mounting said drive wheels for causing them to exert tension on saidside chains, and means, including a clutch disconnectible when the bodyis raised for dumping, for applying power simultaneously to said drivewheels.

25. In, an automotive truck of the character described, the combinationof a tiltable .truck body, ian endless conveyor comprising a portion inthe upper part of the truck body, and a second portion extendingdownwardly and outwardly. said second portion of the conveyor, mountedfor pivotal movement with respect to the first portion, resilient meanscooperating with the front end of the conveyor for keeping it taut andfor absorbing shocks, means for driving the conveyor, power drivenhydraulic means for raising and lowering said truck body, Iand means forraising and lowering the downward extension of the end- LORON G. KURTZ.

CARL C. OTICSON.

